70688

Appears in sequences

• Number of positive integers <= 2^n of form 2 x^2 + 7 y^2.at n=19A054157
• a(n) = n*(2*n^2 + 5*n + 1).at n=32A163832
• Product of the 5th power of a prime and different distinct prime of the 2nd power (p^5*q^2).at n=22A179646
• The greedy sequence of real numbers at least 1 that do not contain any 3-term geometric progressions with integer ratio.at n=34A235054
• Number of (n+1) X (1+1) 0..2 arrays colored with the sum of the maximum and minimum values of each 2 X 2 subblock.at n=5A236011
• Number of (n+1) X (6+1) 0..2 arrays colored with the sum of the maximum and minimum values of each 2 X 2 subblock.at n=0A236016
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the sum of the maximum and minimum values of each 2X2 subblock.at n=15A236018
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the sum of the maximum and minimum values of each 2X2 subblock.at n=20A236018
• Primitive numbers whose abundance is positive and odd.at n=17A259231
• Number of (n+2) X (2+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000101 00010101 or 01010101.at n=9A260009
• Numbers k such that 2*10^k + 51 is prime.at n=23A293912
• Terms of A216427 that are the sum of two coprime terms of A216427.at n=1A307134
• Number of multisets of exactly five partitions of positive integers into distinct parts with total sum of parts equal to n.at n=23A320790
• a(n) = Sum_{d|n} (n-d) * d!.at n=20A348145
• Numbers k for which sqrt(k/2) divides k and the symmetric representation of sigma(k) consists of a single part and its width at the diagonal equals 1.at n=41A365265
• Numbers that have exactly one Zumkeller divisor but are not Zumkeller.at n=15A376877
• a(n) is the least m > 0 such that sigma(m) - 2m = A140863(n).at n=39A380866