34060

Appears in sequences

• a(n) = smallest k such that k! ends in 2^n, not counting the trailing zeros.at n=18A058885
• Numbers k such that 1*k + 1, 3*k + 1, 9*k + 1, 27*k + 1 are all primes.at n=28A112041
• Numbers k such that k^2 divides 21^k-1.at n=40A128401
• Number of (n+1) X 2 0..1 arrays with the number of rightwards and downwards edge increases in each 2 X 2 subblock equal to the number in all its horizontal and vertical neighbors.at n=18A206260
• Number of partitions of n such that the least part is less than its multiplicity.at n=41A240175
• Magic sums of 4 X 4 magic squares composed of odd squares.at n=12A271582
• Number of n X 4 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=8A302274
• Number of chiral pairs of asymmetric polyominoes with n hexagonal cells of the hyperbolic regular tiling with Schläfli symbol {6,oo}.at n=8A389337