21662

Appears in sequences

• a(0) = 1, a(n) = 15*n^2 + 2 for n>0.at n=38A010005
• Number of basis partitions of n+25 with Durfee square size 5.at n=37A053800
• Numbers k such that k and k^2 use only the digits 1, 2, 4, 6 and 9.at n=37A136995
• Convolution of A015723 and A000700.at n=34A274352
• Number of odd chordless cycles in the n-antiprism graph.at n=19A301772
• a(n) is the number of consecutive even prime gap pairs (g1, g2) satisfying g1 == 0 (mod 6) and g2 == 0 (mod 6) out of the first 2^n consecutive even prime gap pairs.at n=17A345332