25671

Appears in sequences

• a(n) = dot_product(1,2,...,n)*(3,4,...,n,1,2).at n=40A026037
• Numbers k such that N*2^k + 1 is prime where N = 9999999999999999999999988888888888888888887777777777777777766666666666665555555555544444443333322211.at n=23A098467
• Integers k such that 10^k+21 is prime.at n=13A108050
• 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, 1, -1), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.at n=9A148905
• Numerators b(n) of Pythagorean approximations b(n)/a(n) to sqrt(5).at n=5A195533
• Partial sums of A299037.at n=53A299767
• a(n) is the least number whose product of digits in primorial base equals n.at n=33A355036