25075
domain: N
Appears in sequences
- a(n) = n^3 + (n+1)^3 + (n+2)^3 + (n+3)^3 + (n+4)^3.at n=15A027604
- Odd 9-gonal (or enneagonal) numbers.at n=42A028991
- a(n) = (2*n+1)*(7*n+1).at n=42A033572
- Base 6 digits are, in order, the first n terms of the periodic sequence with initial period 3,1,2,0.at n=5A037781
- Let u be any string of n digits from {0,...,3}; let f(u) = number of distinct primes, not beginning with 0, formed by permuting the digits of u to a base-4 number; then a(n) = max_u f(u).at n=11A065845
- a(n) = floor((-1)^n*n!*(E(n,2)-E(n,1)*E(n-1,1))) where E(n,x) = Sum_{k=0..n} (-1)^k*x^k/k!.at n=18A065955
- a(n) = round(126*phi^n).at n=23A080074
- a(n) = A063997(n)/4.at n=28A088406
- Enneagonal numbers for which the product of the digits is also an enneagonal number.at n=28A117052
- Primitive terms of A389634.at n=42A389635