113526

Appears in sequences

• 2nd elementary symmetric function of the first n+1 positive integers congruent to 2 mod 3.at n=16A024391
• a(1) = 3; a(n+1) = smallest triangular number formed by inserting one or more digits into a(n).at n=4A068619
• Triangular numbers t such that all the digits needed to write the consecutive triangular numbers from 0 to t fill exactly an equilateral triangle (no holes, no overlaps).at n=27A158030
• Coefficient of x in the reduction of the n-th Fibonacci polynomial by x^3->x^2+2.at n=18A192799
• Positive integers whose binary form follows the periodic pattern 1101110: the concatenation of halftones 2 2 1 2 2 2 1, diminished by one, between successive pitches in the Ionian Major Scale.at n=16A371902