161161

Appears in sequences

• Expansion of (3+x)/(1-x)^6.at n=19A059599
• Palindromes which are the concatenation of 3 or more terms of an arithmetic sequence with nonzero difference.at n=12A062564
• a(1) = 7, a(n) = smallest nontrivial palindromic multiple of a(n-1). a(n) is not equal to a(n-1) or a concatenation of a(n-1) with itself.at n=3A083153
• a(0)=1, a(1)=1, a(n) = 11*a(n/2) for even n, and a(n) = 10*a((n-1)/2) + a((n+1)/2) for odd n >= 3.at n=34A116525
• Palindromes formed from the reflected decimal expansion of golden ratio phi.at n=5A135700
• Totally multiplicative sequence with a(p) = a(p-1) + 10 for prime p.at n=33A166707
• Dates after Jan 01 00 in chronological order which are palindromic when they are written in the format DD.MM.YY. The terms are listed as numbers (without the dots). Leading zeros of the terms are suppressed.at n=19A210888
• Palindromic numbers which can be written as the sum of two or more consecutive squares.at n=36A216446
• Palindromes p = A002113(n) whose index n is a substring of p.at n=16A248753
• a(n) = n*(n + 1)*(n + 2)*(9*n - 7)/12.at n=21A264852
• a(n) = (n + 1)*(2*n + 1)*(4*n + 9)/3.at n=38A269342
• Number of Dyck paths with no UUU's and no DDD's, of semilength 2n and having exactly n (possibly overlapping) occurrences of the consecutive pattern UDUD, where U=(1,1) and D=(1,-1).at n=10A333156
• Number of different ways to partition the set of vertices of a convex (n+11)-gon into 4 nonintersecting polygons.at n=12A350286