21624

Appears in sequences

• Expansion of e.g.f. exp(arctanh(x)/exp(x)).at n=9A013573
• Number of partitions of n into parts not of the form 17k, 17k+7 or 17k-7. Also number of partitions with at most 6 parts of size 1 and differences between parts at distance 7 are greater than 1.at n=39A035968
• Number of nonsquare rectangles on an n X n board.at n=16A052149
• T(2n+3,n), array T as in A055794.at n=14A055796
• Number of 7 X 7 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.at n=18A156392
• Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 18.at n=5A156469
• Irregular triangle in which row n has the values of k>n such that Sum_{i=n..k} i^2 is a square.at n=31A184763
• Numbers k such that k and k + 1 are both Niven numbers in base 3/2 (A342426).at n=38A342427
• Expansion of e.g.f. 1/sqrt(1 - 8 * log(1+x)).at n=4A354260
• A variant of A008336 based on polynomials over GF(2) (see Comments for precise definition).at n=27A369407
• Expansion of e.g.f. (1 + x * exp(x))^4.at n=6A377583
• Rank of the partition of n formed by the terms of its binary expansion from largest to smallest.at n=36A380207