A139721 Number of digits between successive occurences of digit 3 in decimal representation of Pi.

8, 5, 1, 6, 0, 1, 15, 2, 17, 21, 4, 19, 3, 7, 13, 4, 27, 23, 1, 18, 0, 13, 0, 5, 23, 3, 8, 7, 0, 1, 14, 12, 32, 2, 8, 5, 0, 2, 13, 18, 0, 6, 10, 9, 3, 6, 15, 11, 18, 3, 10, 0, 2, 0, 10, 6, 5, 6, 15, 7, 9, 6, 18, 15, 12, 13, 1, 21, 1, 10, 19, 25, 9, 9, 14, 8, 15, 2, 7, 14, 5, 8, 4, 0, 6, 5, 12, 1