105876

Appears in sequences

• Group the triangular numbers so that the n-th group sum is a multiple of n. 1, (3, 6, 10, 15), (21), (28), (36, 45, 55, 66, 78), (91, 105, 120, 136, 153, 171, 190), ... Sequence contains the group sums.at n=17A114031
• Number of permutations of 3 copies of 1..n introduced in order 1..n with no element equal to another within a distance of 3.at n=5A190828
• Number of permutations of n copies of 1..6 introduced in order 1..6 with no element equal to another within a distance of 3.at n=2A190925
• Number of -n..n arrays x(0..3) of 4 elements with zero sum and elements alternately strictly increasing and strictly decreasing.at n=35A200058
• Convolution of nonzero triangular numbers (A000217) and nonzero tetradecagonal numbers (A051866).at n=14A271567