18575

Appears in sequences

• a(n) = Sum_{k=0..n} f(k)*f(n-k) where f(k) = A002124(k).at n=36A002125
• Numbers that are the sum of 6 positive 7th powers.at n=34A003373
• Number of meanders in which first bridge is 5.at n=11A006661
• Composite numbers n such that the sum of divisors of n, sigma(n), divided by the number of divisors, d(n) and sigma(n) minus n are both rational squares.at n=8A049226
• Odd terms of A059756.at n=16A111042
• a(n) = n*L(n) + (n-1)*L(n-1) where L(n) is the Lucas number.at n=12A133673
• 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, -1), (-1, -1, 1), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.at n=9A148766
• Irregular triangle read by rows: T(n,k) = number of meanders with n bridges in which the first bridge is bridge k.at n=66A259974
• Irregular triangle read by rows: T(n,k) = number of meanders with n bridges in which the first bridge is bridge k.at n=70A259974
• Number of n X 2 0..1 arrays with no 1 adjacent to 3 king-move neighboring 1s.at n=7A297088
• T(n,k)=Number of nXk 0..1 arrays with no 1 adjacent to 3 king-move neighboring 1s.at n=37A297094
• T(n,k)=Number of nXk 0..1 arrays with no 1 adjacent to 3 king-move neighboring 1s.at n=43A297094
• Integers k that are periodic points for some iterations of k->A357143(k).at n=24A357954
• Number of n edge connected unsensed planar maps with an external face in which all internal faces are triangles.at n=17A378343