18342

Appears in sequences

• Self-convolution of Lucas numbers.at n=13A004799
• Bisection of Lucas triangle A060922: odd-indexed members of column sequences of A060922 (not counting leading zeros).at n=29A060924
• Numbers equal to a permutation (or rearrangement) of the digits of the sum of their proper divisors. Rearrangements which cause leading zeros are excluded.at n=17A085844
• Least K such that K*(prime(100*n)^(100*n))-1 is prime with prime(n)=n-th prime.at n=16A129245
• This sequence and A139143 are complements. a(1) = 1, A139143(1) = 2, a(n+1) = a(n) + Sum_{k = 1..n} A139143(k).at n=44A139142
• Expansion of 1/(x^10*p(x + 1/x)), where p(x) = 1 - x^3 - x^5 - x^7 + x^10 is a Salem polynomial.at n=16A143471
• Padovan like sequence: a(n) = a(n-2) + a(n-3) for n>3, a(1)=2, a(2)=2, a(3)=0.at n=35A276275
• a(n) = 9*n^2 + 21*n - 6 (n>=1).at n=43A304374
• a(n) = Sum_{p} M(n-k; p_1-1, ..., p_k-1) * Product_{j=1..k} a(p_j), where p = (p_1, ..., p_k) ranges over all partitions of n into smaller parts (k is a partition length and M is a multinomial).at n=8A327729