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A129253号
不大于n且至少有一个除数p^e且p<=e,p为素数的数。
1
0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 7, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 15, 15, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 23
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1,8
评论
a(1)=1,a(n+1)=如果A129251号(n+1)>0,然后是a(n-1)+1,否则是a(n-1)。
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非n
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经核准的