6413571

Appears in sequences

• a(0) = 0, a(1) = 1; for n >= 2, a(n) = a(n-1) + a(n-2) - (n-1) if that number is positive and not already in the sequence, otherwise a(n) = a(n-1) + a(n-2) + (n-1).at n=35A117824
• The smaller of two consecutive triangular numbers which are permutations of each other.at n=4A247305