25675

Appears in sequences

• a(n) = Sum_{t=0..n} g(t)*g(n-t) where g(t) = A002121(t).at n=52A002122
• a(0) = 1, a(n+1) = 3 * a(n) - F(n)*(F(n) + 1), where F(n) = A000045(n) is n-th Fibonacci number.at n=10A011769
• Powers of cube root of 6 rounded down.at n=17A017991
• Number of terms in 5th derivative of a function composed with itself n times.at n=24A022815
• Numbers k such that k^2 + 1 is composite and phi(k^2 + 1) == 0 (mod k).at n=36A067519
• Smallest multiple of n beginning with n and having a digit sum n, or 0 if no such number exists.at n=24A077727
• 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, 1), (0, 0, -1), (1, 0, 0), (1, 1, 0)}.at n=8A150344
• a(n) = binomial(n+5,5) + 4*binomial(n+4,5) + 4*binomial(n+3,5) + binomial(n+2,5).at n=11A244864
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 195", based on the 5-celled von Neumann neighborhood.at n=34A270691
• Centered cubohemioctahedral numbers: a(n) = 2*n^3+9*n^2+n+1.at n=22A274973
• a(n) is the row of the Trithoff (tribonacci) array that contains the tails of the sequence which is n times the tribonacci numbers.at n=32A351685