47621

Appears in sequences

• a(n) = sum of squares of first n positive integers congruent to 1 mod 4.at n=20A024381
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.at n=8A150765
• Numbers n such that n!10 + 2 is prime.at n=58A204657
• Number of length 2+3 0..n arrays with some pair in every consecutive four terms totalling exactly n.at n=9A245952
• Expansion of (1 + 3*x)/(1 - 4*x + 7*x^2).at n=10A271972
• a(n) is the smallest positive integer which can be represented as the sum of distinct nonzero n-gonal pyramidal numbers in exactly n ways, or 0 if no such integer exists.at n=21A350210