87648

Appears in sequences

• a(n) = n*(n + ceiling(2^n/12)).at n=16A029929
• Composite numbers k such that phi(k) divides sigma(k) - 2*k.at n=30A068412
• Coefficients of the derivatives of the Eulerian polynomials (with indexing as in A173018).at n=33A142706
• Number of n X n 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, rows lexicographically nondecreasing, and columns lexicographically nonincreasing.at n=5A229421
• Number of n X 6 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, rows lexicographically nondecreasing, and columns lexicographically nonincreasing.at n=5A229426
• Number of 7-digit numbers whose sum of digits is n.at n=17A278969
• Number of 7-digit numbers whose sum of digits is n.at n=45A278969
• a(n) is the number of solid (3D) partitions of n with 2 layers and second layer a plane partition of 2.at n=16A378854
• Numbers k such that sigma(k) = 2*k + 3*phi(k).at n=9A392691