-1034

Appears in sequences

• a(n) = (n+1)*(2-n)/2.at n=46A080956
• Sum at 45 degrees to horizontal in triangle of A081498.at n=43A081499
• Row sums of number triangle related to the Jacobsthal numbers.at n=23A110325
• Expansion of (1+x^2)/(1-x^4+x^5).at n=51A124746
• Years in which a transit of Venus (as seen from Earth) took place or is expected to occur, according to the catalog by Fred Espenak.at n=15A171467
• Sequence of coefficients arising in study of generating function for A067619.at n=37A186545
• Alternating LCM-sum: a(n) = Sum_{k=1..n} (-1)^(k-1)*lcm(k,n).at n=46A199806
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of A203953.at n=21A203954
• A weighted count of the number of overpartitions of n with restricted odd differences.at n=33A261035